Abstract：Numerical simulations were conducted in a helical axial-flow multiphase pump under water single-phase and air-water two-phase flow conditions to quantitatively analyze energy transfer characteristics of the fluids in the impeller, respectively. By demonstrating the energy transfer characteristics in the impeller, the relationships of flow rate and inlet air volume fraction with the work done in diffe-rent regions of the impeller were revealed. The results show that the impeller mechanical energy is mainly transferred to the fluids in the middle region of the impeller, and the most energy transferred is in static pressure. Further, the impeller capacity of doing work firstly increases and then decreases from the impeller inlet to the outlet. Under water single-phase flow conditions, with increasing flow rate the impeller capacity of doing work is gradually enhanced in forepart of the impeller but weakened in rear part. Under air-water two-phase flow conditions, with increasing inlet air volume fraction, the impeller capacity of doing work is degraded gradually, especially for forepart of the impeller, and the capacity in rear part is less affected. These results can provide a reference for the optimal design of flow components of the helical axial-flow multiphase pump.
史广泰,罗琨*,刘宗库,王志文. 螺旋轴流式多相混输泵叶轮域的能量特性[J]. 排灌机械工程学报, 2020, 38(7): 670-676.
SHI Guangtai,LUO Kun*,LIU Zongku,WANG Zhiwen. Energy transfer characteristics of fluid in impeller of helical axial-flow multiphase pump. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(7): 670-676.
